A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Metanephrines, Fractionated, LC/MS/MS, Random Urine
Test Code14961
Alias/See Also
LAB00348
CPT Codes
82570, 83835
Includes
Metanephrines, Normetanephrines, Total Metanephrines, Creatinine
Preferred Specimen
5 mL random urine with 6N HCl in plastic screw-cap container
Patient Preparation
It is preferable for the patient to be off medications for three days prior to collection. Patient should avoid tobacco, tea, coffee, for three days prior to specimen collection. Common antihypertensives (diuretics, ACE inhibitors, calcium channel blockers, alpha and beta blockers) cause minimal or no interference. Medications which are alpha agonists (Aldomet), alpha blockers (Dibenzyline) should be avoided 18-24 hours prior to specimen collection.
Minimum Volume
1.5 mL
Other Acceptable Specimens
25 mL 6N HCl • No preservative • 10 mL concentrated glacial acetic acid
Acceptable to add preservative after collection
Acceptable to add preservative after collection
Instructions
After urine collection, add 6N HCl to maintain a pH below 3. Urine without preservative is acceptable if pH is below 6 and the sample is shipped frozen. Record patients age on test request form and urine vial.
Transport Container
Plastic urine container
Transport Temperature
Preserved: Room temperature
Unpreserved: Frozen
Specimen Stability
Preserved urine
Room temperature: 10 days
Refrigerated: 14 days
Frozen: 90 days
Unpreserved urine
Room temperature: Unacceptable
Refrigerated: Unacceptable
Frozen: 30 days
Room temperature: 10 days
Refrigerated: 14 days
Frozen: 90 days
Unpreserved urine
Room temperature: Unacceptable
Refrigerated: Unacceptable
Frozen: 30 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Urine collected with boric acid
Methodology
Chromatography/Mass Spectrometry
FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Setup Schedule
Mon-sat
Report Available
3-6 days
Reference Range
See Laboratory Report
Clinical Significance
Useful in the evaluation of pheochromocytoma.
Performing Laboratory
Quest Diagnostics Nichols Institute-San Juan Capistrano, CA |
33608 Ortega Highway |
San Juan Capistrano, CA 92675-2042 |